IDENTIFIKASI DAN PENGUKURAN GAS SO₂ AREA SA (SULPHURIC ACID) DI PT PETROKIMIA GRESIK MENGGUNAKAN SENSOR GAS DAN JARINGAN SYARAF TIRUAN

Yahya Abdul Ghofur; Misbah Misbah; Yoedo Ageng Suryo

doi:10.30587/e-link.v16i1.2692

IDENTIFIKASI DAN PENGUKURAN GAS SO₂ AREA SA (SULPHURIC ACID) DI PT PETROKIMIA GRESIK MENGGUNAKAN SENSOR GAS DAN JARINGAN SYARAF TIRUAN

E-Link : Jurnal Teknik Elektro dan Informatika ◽

10.30587/e-link.v16i1.2692 ◽

2021 ◽

Vol 16 (1) ◽

pp. 46

Author(s):

Yahya Abdul Ghofur ◽

Misbah Misbah ◽

Yoedo Ageng Suryo

Keyword(s):

Sulphuric Acid

Unit SA (Sulphuric Acid), dengan bahan baku belerang (S) serta udara kering merupakan produk dari PT Petrokimia Gresik Dengan kapasitas produksi 1800 ton/hari, dan menghasilkan produk utama berupa Asam Sulfat (H2SO4). Meskipun sudah dibuang melalui stack, operator tidak mengetahui bahwa disekitar unit asam sulfat tersebut masih ada sisa pembuangan gas SO2 yang berbahaya bagi kesehatan terutama pada pernapasan. Untuk mengatisipasi hal tersebut, dibuatlah alat yang dapat mendeteksi Gas SO2 dengan Metode Jaringan Syaraf Tiruan Backpropagation dengan mikrokontroler Arduino. Dari hasil pengujian dapat disimpulkan bahwa alat yang telah dibuat dapat mengidentifikasi dan mengukur Gas SO2 pada Area SA (Sulphuric Acid) di PT Petrokimia Gresik menggunakan sensor gas dan Jaringan Syaraf Tiruan dengan akurasi 97%.

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A non-cyanide method of electropolishing silver

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100107873 ◽

1978 ◽

Vol 36 (1) ◽

pp. 146-147

Author(s):

R. L. Lyles ◽

S. J. Rothman ◽

W. Jäger

Keyword(s):

Electron Microscopy ◽

Sulphuric Acid ◽

Methyl Alcohol ◽

Health Hazards ◽

Silver Alloy ◽

High Quality ◽

Silver Alloys ◽

Free Sample ◽

Specimen Quality ◽

Standard Techniques

Standard techniques of electropolishing silver and silver alloys for electron microscopy in most instances have relied on various CN recipes. These methods have been characteristically unsatisfactory due to difficulties in obtaining large electron transparent areas, reproducible results, adequate solution lifetimes, and contamination free sample surfaces. In addition, there are the inherent health hazards associated with the use of CN solutions. Various attempts to develop noncyanic methods of electropolishing specimens for electron microscopy have not been successful in that the specimen quality problems encountered with the CN solutions have also existed in the previously proposed non-cyanic methods.The technique we describe allows us to jet polish high quality silver and silver alloy microscope specimens with consistant reproducibility and without the use of CN salts.The solution is similar to that suggested by Myschoyaev et al. It consists, in order of mixing, 115ml glacial actic acid (CH3CO2H, specific wt 1.04 g/ml), 43ml sulphuric acid (H2SO4, specific wt. g/ml), 350 ml anhydrous methyl alcohol, and 77 g thiourea (NH2CSNH2).

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